{volist name="list" id="vo"}
    {eq name="showCode" value="1"}
        <option value="{$vo['code']}"  {eq name="vo['code']" value="$checkedID"}selected="selected"{/eq} >{$vo.title_show}</option>
        {else/}
        <option value="{$vo['id']}"  {eq name="vo['id']" value="$checkedID"}selected="selected"{/eq} >{$vo.title_show}</option>
    {/eq}
{/volist}